Hi everyone,
this my first post, after very few days of experience with Unraid, so don't blame me for my newbie's questions!
I got for free an HP MicroServer G8 and for now I've done the following upgrades:
- CPU: from Celeron 1610T to Xeon E3-1265L V2
- RAM: from 2 GB 1333mhz ECC to 16 GB (max) 1600 mhz ECC (already ordered, waiting for delivery)
- HDD: 3x 4TB WD Red Plus 128 MB cache (wanna add 1 more in the future) + 1x WD Green 1 TB I had already
- Cache drive: Samsung NVME 970 512 GB on PCI-e adapter (Glotrends PA09-HS). This is a temporary cache drive, soon I'll put it back in my PC! 🤣
Now, it seems with default controller (HP Dynamic Smart Array B120i), disks run very slow (moving big .mkv/.iso from a disk to another one at ~30 mb/s), but according to what I read here parity build/check speed is fine (102 mb/s is final average after 10h 50m, it started to go faster after having finished the 1st TB, I suppose because the 1st disk -WD green- is slower).
Because of there's only 1x PCI-e slot, I was thinking about removing the NVME controller and putting there a better SAS HBA controller and then use a normal SATA SSD as cache drive... Most probably, in the future I'll do some more modifications, so I need more SATA slots...
The problem is that I'm becoming crazy in understanding which controller to buy, I just know I want a controller with good speed and that may support up to 8 drives: I really cannot understand the differences from an item to another one in ebay for the same model... For example: if you search for "LSI 9207-8i LSI 2308" or for "LSI 9300-8i LSI 3008" or for "LSI 9211-8i LSI 2008" there are many PCIe cards, ranging from 30-40€ up to 150-200€... What's the difference between them? Why for the same model there can be so huge price differences?! Are there some particular models that should be avoided? When would I be safe in buying a good card? Should I check the board is from Broadcomm, LSI but not from HP or Dell? Or should I check the chipset is LSI 2308 or LSI 3008?
For example, for what regards LSI 9207-8i: those from China costs 1/2 than those in Europe... Is it normal? Are those from China genuine as those in Europe? Ok, from China it would take 15-45 days for shipping + eventually custom's duties and VAT, but it costs 1/2 - 1/3 than those from Europe and many of the already includes SFF-8087 to SATA cables and both full+low profile brackets...
https://www.ebay.it/itm/192902515361
https://www.ebay.it/itm/225024668461
https://www.ebay.it/itm/143676698994
https://www.ebay.it/itm/143356890894
In case someone wants to investigate about why trasfer speed is so slow, I attach diagnostic report.
endys-diagnostics-20221016-0304.zip